Quote Originally Posted by ChadS View Post
At a certain point the noise issue will bite you at too high a resolution and too low light level. True, you can always integrate the signal over several pixels but the net result of that is a higher noise floor vs. having one large pixel capturing the same number of photons. I'm certain that for bright light conditions it should be possible to reach ~100 MP given the sharpness of the best lenses and improvements to sensors that we know how to do. However, I fear for low-light conditions.
There seems to be a lot of confusion about this topic. As Daniel said, image quality will only be higher or the same, not lower, with more MP. Noise will not be worse just because there are more pixels. The only downside of more MP is that it takes up more data.